Plug-valve.



10.867,399. PATBNT'ED ocT.1,19o7.

M. J. MoGILL.

PLUG VALVE.

APPLICATION FILED PEB. 27, 1907.

M lfm/wzl, v

UNITED STATES PATENT OFFICE.

MICHAEL .L

MCGILL, oF PARK CITY, UTAH.

PLUG-VALVE Specication of Letters Patent.

Patented Oct. 1,-1907.

Application filed February 27, 1907. Serial No. 359,602.

To al-l whom it may concern: p A

Be it known that I, MICHAEL J. MCGILL, a citizen of Athe United States, residingat Park City, inV the county `-of Summit and State'of Utah, have invented anew -combinations of parts which will be hereinafter more muy described 'and pointed butin the chime.

"In the accompanying drawings is shown lthe pre-- ierred form of the invention.. 1

ln said drawings: Figure 1- is a side elevation of the v aliie; Fig. 2 is a longitudinal section therethrough; and Figl 3 is a' section on line xx`, IFig. 2.

Refr'ring to the figures by characters of reference, 1 is avalve casing having oppositely'.` extending branches` 2. The upper end 3' of the casing is sc'reiwftlreadedas shown and the lower end 4 of said casing is also screw threadedr The casing has a `tapered valve seat 5 therein, said seat being gradually reduced i'diameter toward the lower end. of the casing. upper or large end ofthe seatis counterbored -showli at 6,

and this'countersunk portion is designed "to receive a ring 7 disposed to surround the stem 8o atapercd pulg valve 9. An annular nieuwe 1o is formed bythe valve at the base 'of the stem 8 and constitutes an Xabutment for the ring 7..- This ring is held against rotation within the casing by means of akey 11.. A' bottom cap l2 surrounds'the lower end oi the casi-ng and engages the threaded -portion thereofr and this cap 'is designed to close said end of the casing and. prevent leakage or the admission ot dust. The upper threaded portion of. the casing is engaged Aby a nut 13 having an inwardly extending 4Hange 14 which laps their-ing 7 and bears thcreagainst and is designed when the nut is screwed on to the top portion 3 to force the ring into the counterbored portion 6 and against the shoulder 10 seas to hold the valve tightly upon its seat. A.

suitable handle l5 may be connected to the stem 8 in any desired manner whereby the valve can be readily turned upon' its seat.l 5V v The valve herein described is, as before stated, particularly designed for controlling air under pressure' and by-reason oi its peculiar construction it becomes impossible for the stem t0 beblown out of its'seat and leakage and the admission of dust is absolutely prevented. As the seat and the valve Wear the valve can be adjusted longitudinally simply by tightening thel nut 13 and should the seat get out of true it is merely necessary to remove the valve and the cap 12 Whereupon a taper-reamer can beinserted into the casing .and the speatirealdilyl dressed. It is to be understood that this valve or plug cock may be used for steam or water as well as air. It may also be used as a cylinder cock and in fact Wherever eiiiciency and durability are i desirable.

What is claimed is: i

vA valve comprising n casing having a 'tapered scat eX- tending therethrough,the large end of the seat being counterbored, both ends of said seat being open, n screw cap surrounding and engaging'fthe small end of the seatand constituting a closure therefor, u tapered plug valve Hearing upon the seatnnd having a stem at the large end thereof, therebeing an annular shoulder surrounding the ste'm, a ring bearing upon the shoulder and disposed fwithin the counterbored portion 'of the seat, a key engaging said ring and the counterhored portion to prevent rotatlon of the ring,- and a nut surrounding and detachubly engaging the largeiend` of the seat and disposed to bear upon the ring' and force lt against the shoulder. l

In testimonythat I clalmthe foregoing as my own, I l

have hereto affixed my signature in the presence of two witnesses.

. MICHAEL J McGILL.' I s Witnesses.:

I-Innnr FAnns,

.T. 'l horroroso. 

